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never [62]
3 years ago
14

How old is a 13 year old is going to be in 2021?

Mathematics
2 answers:
Sever21 [200]3 years ago
8 0
17 years

<span>a 13 year old is going to be 17 year old in 2021.

Hope it helps!!</span>
Anna11 [10]3 years ago
5 0
In 2021 a 13 year old will be 17 years old.
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Step-by-step explanation:

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3 years ago
Dubnium-262 has a half-life of 34 s. How long will it take for 500.0 grams to
dmitriy555 [2]

Answer:

the time taken for the radioactive element to decay to 1 g is 304.8 s.

Step-by-step explanation:

Given;

half-life of the given Dubnium = 34 s

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final mass of the element, mf = 1 g

The time taken for the radioactive element to decay to its final mass is calculated as follows;

1 = 500 (0.5)^{\frac{t}{34}} \\\\\frac{1}{500} =  (0.5)^{\frac{t}{34}}\\\\log(\frac{1}{500}) = log [(0.5)^{\frac{t}{34}}]\\\\log(\frac{1}{500})  = \frac{t}{34} log(0.5)\\\\-2.699 = \frac{t}{34} (-0.301)\\\\t = \frac{2.699 \times 34}{0.301} \\\\t = 304.8 \ s

Therefore, the time taken for the radioactive element to decay to 1 g is 304.8 s.

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2 years ago
Compare the linear functions expressed below by data in a table and by an equation.
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b,c,e

Step-by-step explanation:

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